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NARROW
Format
Article Type
Journal
Publisher
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
-
Australasia
-
Australia
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Otway Basin (1)
-
South Australia (1)
-
-
New Zealand (1)
-
-
Black Hills (1)
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Canada
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Western Canada
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Alberta (1)
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-
-
Clear Creek (1)
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Europe
-
Western Europe
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United Kingdom
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Great Britain
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England (1)
-
-
-
-
-
Front Range (1)
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Granite Mountains (5)
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Green River basin (2)
-
Lewis thrust fault (1)
-
North America
-
Rio Grande Rift (1)
-
Rocky Mountains
-
Central Rocky Mountains (1)
-
Northern Rocky Mountains (4)
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (1)
-
-
Bighorn Mountains (2)
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Laramie Mountains (1)
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Medicine Bow Mountains (1)
-
Owl Creek Mountains (2)
-
Sangre de Cristo Mountains (1)
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Uinta Mountains (1)
-
Wet Mountains (1)
-
Wind River Range (29)
-
-
-
Rocky Mountains foreland (2)
-
Williston Basin (1)
-
-
Rattlesnake Hills (1)
-
South America
-
Venezuela
-
Lake Maracaibo (2)
-
-
-
Taranaki Basin (1)
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United States
-
Bighorn Basin (3)
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Bighorn River (1)
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California (1)
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Colorado
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Douglas County Colorado (1)
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Elbert County Colorado (1)
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Garfield County Colorado (1)
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Piceance Basin (1)
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Wet Mountains (1)
-
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Denver Basin (1)
-
Idaho
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Bear Lake County Idaho (1)
-
Snake River plain (1)
-
-
Louisiana (2)
-
Mississippi Delta (2)
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Montana
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Beaverhead County Montana (1)
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Big Horn County Montana (1)
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Carbon County Montana (1)
-
Park County Montana (1)
-
-
Nebraska
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Keya Paha County Nebraska (1)
-
Sioux County Nebraska (1)
-
-
Nevada
-
White Pine County Nevada (1)
-
-
New Mexico
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Rio Arriba County New Mexico
-
Nacimiento Mountains (1)
-
-
-
Oregon (1)
-
Powder River basin (1)
-
Sevier orogenic belt (2)
-
South Dakota
-
Brule County South Dakota (1)
-
Gregory County South Dakota (1)
-
Shannon County South Dakota (1)
-
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (1)
-
-
Bighorn Mountains (2)
-
Laramie Mountains (1)
-
Medicine Bow Mountains (1)
-
Owl Creek Mountains (2)
-
Sangre de Cristo Mountains (1)
-
Uinta Mountains (1)
-
Wet Mountains (1)
-
Wind River Range (29)
-
-
Utah
-
Box Elder County Utah (1)
-
Daggett County Utah (1)
-
Millard County Utah
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House Range (1)
-
-
Wayne County Utah (1)
-
-
Western U.S. (5)
-
Wyoming
-
Albany County Wyoming (3)
-
Big Horn County Wyoming (2)
-
Carbon County Wyoming
-
Seminoe Mountains (1)
-
Shirley Basin (1)
-
-
Converse County Wyoming (2)
-
Crook County Wyoming (1)
-
Fremont County Wyoming (79)
-
Gas Hills (2)
-
Great Divide Basin (3)
-
Hot Springs County Wyoming (4)
-
Johnson County Wyoming (1)
-
Laramie County Wyoming (1)
-
Lost Soldier Field (1)
-
Natrona County Wyoming (14)
-
Owl Creek Mountains (2)
-
Park County Wyoming (1)
-
Platte County Wyoming (1)
-
Sheridan County Wyoming (1)
-
Sublette County Wyoming (15)
-
Sweetwater County Wyoming (12)
-
Teton County Wyoming
-
Jackson Hole (1)
-
-
Washakie County Wyoming (2)
-
Wind River Range (29)
-
-
Wyoming Province (6)
-
-
Wind River (3)
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Wind River basin (14)
-
-
commodities
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energy sources (2)
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metal ores
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lead ores (2)
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uranium ores (8)
-
-
mineral deposits, genesis (5)
-
mineral exploration (2)
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mineral resources (1)
-
oil and gas fields (2)
-
petroleum
-
natural gas
-
shale gas (1)
-
-
shale oil (1)
-
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (3)
-
C-14 (2)
-
-
halogens
-
chlorine
-
Cl-36 (2)
-
-
-
hydrogen
-
D/H (1)
-
deuterium (1)
-
-
isotope ratios (7)
-
isotopes
-
radioactive isotopes
-
Al-26 (1)
-
Be-10 (5)
-
C-14 (2)
-
Cl-36 (2)
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (2)
-
Pb-208/Pb-204 (2)
-
-
stable isotopes
-
C-13/C-12 (3)
-
D/H (1)
-
deuterium (1)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (3)
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (2)
-
Pb-208/Pb-204 (2)
-
S-34/S-32 (1)
-
Sr-87/Sr-86 (3)
-
-
-
metals
-
actinides
-
thorium (3)
-
-
alkaline earth metals
-
beryllium
-
Be-10 (5)
-
-
strontium
-
Sr-87/Sr-86 (3)
-
-
-
aluminum
-
Al-26 (1)
-
-
iron (2)
-
lead
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (2)
-
Pb-208/Pb-204 (2)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
-
-
-
oxygen
-
O-18/O-16 (3)
-
-
sulfur
-
S-34/S-32 (1)
-
-
-
fossils
-
burrows (1)
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Amphibia
-
Lissamphibia
-
Anura (1)
-
-
-
Mammalia
-
Theria
-
Eutheria
-
Carnivora (1)
-
Perissodactyla
-
Hippomorpha
-
Equidae (1)
-
-
-
Rodentia (1)
-
-
-
-
Reptilia
-
Diapsida
-
Ichthyosauria (1)
-
Sauropterygia
-
Plesiosauria (1)
-
-
-
-
-
-
-
ichnofossils (2)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Insecta (1)
-
-
Trilobitomorpha
-
Trilobita (1)
-
-
-
Brachiopoda (3)
-
Mollusca
-
Bivalvia (2)
-
Gastropoda (1)
-
-
Porifera (1)
-
-
microfossils (3)
-
palynomorphs
-
miospores
-
Momipites (2)
-
pollen (2)
-
-
-
Plantae
-
Spermatophyta
-
Angiospermae (2)
-
Gymnospermae
-
Coniferales
-
Taxodiaceae
-
Metasequoia (1)
-
-
-
-
-
-
-
geochronology methods
-
(U-Th)/He (1)
-
Ar/Ar (3)
-
exposure age (3)
-
fission-track dating (2)
-
paleomagnetism (4)
-
Pb/Pb (1)
-
Pb/Th (1)
-
Rb/Sr (2)
-
tephrochronology (2)
-
thermochronology (3)
-
U/Pb (9)
-
U/Th/Pb (3)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene
-
upper Pleistocene
-
Weichselian
-
upper Weichselian
-
Younger Dryas (1)
-
-
-
-
-
upper Quaternary
-
Bull Lake Glaciation (4)
-
Pinedale Glaciation (2)
-
-
-
Tertiary
-
Arikaree Group (1)
-
Arikareean (1)
-
lower Tertiary (1)
-
middle Tertiary (1)
-
Neogene
-
Miocene
-
Astoria Formation (1)
-
Barstovian (2)
-
lower Miocene
-
Hemingfordian (2)
-
-
Valentine Formation (1)
-
-
Ogallala Formation (1)
-
Pliocene (2)
-
-
Paleogene
-
Eocene
-
lower Eocene
-
Wind River Formation (3)
-
-
middle Eocene
-
Aycross Formation (1)
-
-
Uintan (1)
-
upper Eocene
-
Tepee Trail Formation (1)
-
-
-
Oligocene
-
lower Oligocene (2)
-
-
Paleocene
-
lower Paleocene (1)
-
upper Paleocene
-
Tiffanian (1)
-
-
-
White River Group (1)
-
-
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Cloverly Formation (1)
-
Lakota Formation (2)
-
Muddy Sandstone (1)
-
-
Upper Cretaceous
-
Fox Hills Formation (1)
-
Frontier Formation (1)
-
Lance Formation (2)
-
Lewis Shale (1)
-
Mesaverde Group (3)
-
Rock Springs Formation (1)
-
-
-
Jurassic
-
Oxford Clay (1)
-
Upper Jurassic
-
Stump Formation (1)
-
Sundance Formation (3)
-
-
-
Triassic
-
Lower Triassic
-
Dinwoody Formation (1)
-
Permian-Triassic boundary (1)
-
-
Red Peak Formation (1)
-
-
-
Paleozoic
-
Cambrian
-
Middle Cambrian
-
Flathead Sandstone (1)
-
-
Upper Cambrian (1)
-
-
Permian
-
Park City Formation (2)
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
-
Precambrian
-
Archean
-
Mesoarchean (1)
-
Neoarchean (4)
-
Paleoarchean (1)
-
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (1)
-
Paleoproterozoic (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
plutonic rocks
-
gabbros (1)
-
granites (3)
-
-
volcanic rocks
-
pyroclastics
-
tuff (1)
-
-
-
-
volcanic ash (1)
-
-
metamorphic rocks
-
metamorphic rocks
-
amphibolites (1)
-
gneisses
-
orthogneiss (1)
-
-
granulites (1)
-
metaigneous rocks (2)
-
metaplutonic rocks (1)
-
metasedimentary rocks
-
metapelite (1)
-
-
metavolcanic rocks (1)
-
mylonites (2)
-
-
-
minerals
-
carbonates
-
calcite (1)
-
-
minerals (2)
-
oxides
-
uraninite (2)
-
-
phosphates
-
apatite (2)
-
monazite (1)
-
-
silicates
-
chain silicates
-
amphibole group
-
clinoamphibole
-
hornblende (1)
-
-
-
-
orthosilicates
-
nesosilicates
-
zircon group
-
coffinite (1)
-
zircon (4)
-
-
-
-
-
sulfates
-
gypsum (1)
-
-
-
Primary terms
-
absolute age (18)
-
Australasia
-
Australia
-
Otway Basin (1)
-
South Australia (1)
-
-
New Zealand (1)
-
-
biogeography (1)
-
Canada
-
Western Canada
-
Alberta (1)
-
-
-
carbon
-
C-13/C-12 (3)
-
C-14 (2)
-
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene
-
upper Pleistocene
-
Weichselian
-
upper Weichselian
-
Younger Dryas (1)
-
-
-
-
-
upper Quaternary
-
Bull Lake Glaciation (4)
-
Pinedale Glaciation (2)
-
-
-
Tertiary
-
Arikaree Group (1)
-
Arikareean (1)
-
lower Tertiary (1)
-
middle Tertiary (1)
-
Neogene
-
Miocene
-
Astoria Formation (1)
-
Barstovian (2)
-
lower Miocene
-
Hemingfordian (2)
-
-
Valentine Formation (1)
-
-
Ogallala Formation (1)
-
Pliocene (2)
-
-
Paleogene
-
Eocene
-
lower Eocene
-
Wind River Formation (3)
-
-
middle Eocene
-
Aycross Formation (1)
-
-
Uintan (1)
-
upper Eocene
-
Tepee Trail Formation (1)
-
-
-
Oligocene
-
lower Oligocene (2)
-
-
Paleocene
-
lower Paleocene (1)
-
upper Paleocene
-
Tiffanian (1)
-
-
-
White River Group (1)
-
-
-
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Amphibia
-
Lissamphibia
-
Anura (1)
-
-
-
Mammalia
-
Theria
-
Eutheria
-
Carnivora (1)
-
Perissodactyla
-
Hippomorpha
-
Equidae (1)
-
-
-
Rodentia (1)
-
-
-
-
Reptilia
-
Diapsida
-
Ichthyosauria (1)
-
Sauropterygia
-
Plesiosauria (1)
-
-
-
-
-
-
-
climate change (1)
-
crust (11)
-
crystal chemistry (1)
-
data processing (2)
-
deformation (1)
-
diagenesis (3)
-
economic geology (13)
-
energy sources (2)
-
engineering geology (1)
-
Europe
-
Western Europe
-
United Kingdom
-
Great Britain
-
England (1)
-
-
-
-
-
faults (15)
-
folds (5)
-
fractures (2)
-
geochemistry (12)
-
geochronology (8)
-
geomorphology (6)
-
geophysical methods (11)
-
geosynclines (1)
-
glacial geology (1)
-
ground water (1)
-
hydrogen
-
D/H (1)
-
deuterium (1)
-
-
hydrology (2)
-
ichnofossils (2)
-
igneous rocks
-
plutonic rocks
-
gabbros (1)
-
granites (3)
-
-
volcanic rocks
-
pyroclastics
-
tuff (1)
-
-
-
-
intrusions (7)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Insecta (1)
-
-
Trilobitomorpha
-
Trilobita (1)
-
-
-
Brachiopoda (3)
-
Mollusca
-
Bivalvia (2)
-
Gastropoda (1)
-
-
Porifera (1)
-
-
isotopes
-
radioactive isotopes
-
Al-26 (1)
-
Be-10 (5)
-
C-14 (2)
-
Cl-36 (2)
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (2)
-
Pb-208/Pb-204 (2)
-
-
stable isotopes
-
C-13/C-12 (3)
-
D/H (1)
-
deuterium (1)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (3)
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (2)
-
Pb-208/Pb-204 (2)
-
S-34/S-32 (1)
-
Sr-87/Sr-86 (3)
-
-
-
magmas (1)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Cloverly Formation (1)
-
Lakota Formation (2)
-
Muddy Sandstone (1)
-
-
Upper Cretaceous
-
Fox Hills Formation (1)
-
Frontier Formation (1)
-
Lance Formation (2)
-
Lewis Shale (1)
-
Mesaverde Group (3)
-
Rock Springs Formation (1)
-
-
-
Jurassic
-
Oxford Clay (1)
-
Upper Jurassic
-
Stump Formation (1)
-
Sundance Formation (3)
-
-
-
Triassic
-
Lower Triassic
-
Dinwoody Formation (1)
-
Permian-Triassic boundary (1)
-
-
Red Peak Formation (1)
-
-
-
metal ores
-
lead ores (2)
-
uranium ores (8)
-
-
metals
-
actinides
-
thorium (3)
-
-
alkaline earth metals
-
beryllium
-
Be-10 (5)
-
-
strontium
-
Sr-87/Sr-86 (3)
-
-
-
aluminum
-
Al-26 (1)
-
-
iron (2)
-
lead
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (2)
-
Pb-208/Pb-204 (2)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
-
-
-
metamorphic rocks
-
amphibolites (1)
-
gneisses
-
orthogneiss (1)
-
-
granulites (1)
-
metaigneous rocks (2)
-
metaplutonic rocks (1)
-
metasedimentary rocks
-
metapelite (1)
-
-
metavolcanic rocks (1)
-
mylonites (2)
-
-
metamorphism (6)
-
mineral deposits, genesis (5)
-
mineral exploration (2)
-
mineral resources (1)
-
mineralogy (2)
-
minerals (2)
-
North America
-
Rio Grande Rift (1)
-
Rocky Mountains
-
Central Rocky Mountains (1)
-
Northern Rocky Mountains (4)
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (1)
-
-
Bighorn Mountains (2)
-
Laramie Mountains (1)
-
Medicine Bow Mountains (1)
-
Owl Creek Mountains (2)
-
Sangre de Cristo Mountains (1)
-
Uinta Mountains (1)
-
Wet Mountains (1)
-
Wind River Range (29)
-
-
-
Rocky Mountains foreland (2)
-
Williston Basin (1)
-
-
oil and gas fields (2)
-
orogeny (3)
-
oxygen
-
O-18/O-16 (3)
-
-
paleoclimatology (5)
-
paleoecology (7)
-
paleogeography (6)
-
paleomagnetism (4)
-
paleontology (7)
-
Paleozoic
-
Cambrian
-
Middle Cambrian
-
Flathead Sandstone (1)
-
-
Upper Cambrian (1)
-
-
Permian
-
Park City Formation (2)
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
-
palynomorphs
-
miospores
-
Momipites (2)
-
pollen (2)
-
-
-
petroleum
-
natural gas
-
shale gas (1)
-
-
shale oil (1)
-
-
petrology (1)
-
Plantae
-
Spermatophyta
-
Angiospermae (2)
-
Gymnospermae
-
Coniferales
-
Taxodiaceae
-
Metasequoia (1)
-
-
-
-
-
-
plate tectonics (3)
-
Precambrian
-
Archean
-
Mesoarchean (1)
-
Neoarchean (4)
-
Paleoarchean (1)
-
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (1)
-
Paleoproterozoic (1)
-
-
-
-
sea-level changes (1)
-
sedimentary petrology (4)
-
sedimentary rocks
-
bone beds (1)
-
carbonate rocks
-
limestone (2)
-
-
clastic rocks
-
conglomerate (2)
-
red beds (1)
-
sandstone (4)
-
shale (1)
-
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Fremont County Wyoming
Timing and structural evolution of the Sevier thrust belt, western Wyoming Available to Purchase
ABSTRACT The results of new detrital zircon analyses of 15 ( n = 1334) Sevier belt synorogenic (Jurassic–Eocene) conglomerates combined with U-Pb zircon ages from the literature ( n = 2638) support the structurally dynamic role of the western Paris thrust sheet as the dominant high-standing, out-of-sequence portion of the Sevier belt. This result requires modification of the traditional structural view of the thin-skinned Sevier fold-and-thrust belt having formed by west-to-east shortening over an ~100-m.y. period (ca. 150–50 Ma) with episodic thrust motions that become younger toward the craton (east), as constrained by numerous synorogenic deposits shed to the east from each thrust hanging wall. Sevier thrusting was preceded by deposition of the Jurassic Stump Formation, which has a maximum depositional age of 149 Ma and a unique detrital zircon and heavy mineral (garnet, magnetite) provenance. The oldest thrust, the Paris (Willard) thrust, eroded and deposited the Jurassic–Cretaceous Ephraim Conglomerate as a synorogenic fan devoid of quartzite clasts and with a detrital zircon provenance consistent with reworked sediment from the fold belt, but not from the hinterland or the Sierra Nevada arc of the orogenic system. All subsequent synorogenic deposits from the mid-Cretaceous Echo Conglomerate (Meade-Crawford thrust) to a variety of more easterly Eocene deposits (Sevier belt, Green River, Absaroka, and Bighorn basins) are rich in quartzite clasts. All the quartzite clasts were eroded from the Paris thrust hanging wall, which reached its peak orogenic height at ca. 95 Ma, 50 m.y. after first motion, and the Proterozoic Brigham Group remained a quartzite clast source for ~40 m.y. The detrital zircon signatures of these samples require additional sources of sediment, reworked from the hinterland and the Sierra Nevada and Idaho Batholith arcs, thus implying that long-distance sediment fairway(s) were active during the Mesozoic–early Cenozoic. Based on the same detrital zircon data, variable sources of sediment are inferred between each of the thrust sheets; however, within each thrust system, the source of sediment remained the same. The Teton Range was thrust up at ca. 50 Ma, long after the Sevier belt formed, and it was not a buttress to thin-skinned Sevier deformation. Rather, Teton–Gros Ventre–Wind River Laramide uplifts deformed the older Sevier belt with numerous back and out-of-sequence thrusts and synorogenic deposits, including the Darby thrust, which records the youngest displacement.
Endemism in Wyoming plant and insect herbivore communities during the early Eocene hothouse Available to Purchase
The leading wisps of Yellowstone: Post–ca. 5 Ma extension-related magmatism in the upper Wind River Basin, Wyoming (USA), associated with the Yellowstone hotspot tectonic parabola Open Access
Structural evolution of an en echelon fold system within the Laramide foreland, central Wyoming: From early layer-parallel shortening to fault propagation and fold linkage Open Access
A New Paleoecological Look at the Dinwoody Formation (Lower Triassic, Western USA): Intrinsic Versus Extrinsic Controls on Ecosystem Recovery After the End-Permian Mass Extinction Available to Purchase
Palaeoecology of the marine reptiles of the Redwater Shale Member of the Sundance Formation (Jurassic) of central Wyoming, USA Available to Purchase
An Overview of Low-temperature Thermochronology in the Rocky Mountains and Its Application to Petroleum System Analysis Available to Purchase
Abstract A synthesis of low-temperature thermochronologic results throughout the Laramide foreland illustrates that samples from wellbores in Laramide basins record either (1) detrital Laramide or older cooling ages in the upper ~1 km (0.62 mi) of the wellbore, with younger ages at greater depths as temperatures increase; or (2) Neogene cooling ages. Surface samples from Laramide ranges typically record either Laramide or older cooling ages. It is apparent that for any particular area the complexity of the cooling history, and hence the tectonic history interpreted from the cooling history, increases as the number of studies or the area covered by a study increases. Most Laramide ranges probably experienced a complex tectono-thermal evolution. Deriving a regional timing sequence for the evolution of the Laramide basins and ranges is still elusive, although a compilation of low-temperature thermochronology data from ranges in the Laramide foreland suggests a younging of the ranges to the south and southwest. Studies of subsurface samples from Laramide basins have, in some cases, been integrated with and used to constrain results from basin burial-history modeling. Current exploration for unconventional shale-oil or shale-gas plays in the Rocky Mountains has renewed interest in thermal and burial history modeling as an aid in evaluating thermal maturity and understanding petroleum systems.This paper suggests that low-temperature thermochronometers are underutilized tools that can provide additional constraints to burial-history modeling and source rock evaluation in the Rocky Mountain region.
Applications of Google Earth Pro to fracture and fault studies of Laramide anticlines in the Rocky Mountain foreland Available to Purchase
Google Earth Pro imagery was used by graduate students for a course project to identify, describe, and interpret lineament patterns on two oil-producing anticlines in Wyoming, one in the northwest Wind River Basin and the other in the southern Bighorn Basin (Maverick Springs and Thermopolis anticlines, respectively). These anticlines lie on opposite sides of the east-west–trending Owl Creek arch, which is a sinistral, transpressive array of en echelon, basement-involved thrust blocks. Both anticlines are well-exposed and display extensive near-surface fracturing and faulting, making them ideal candidates for a study of fold-related lineament patterns. Google Earth Pro was used to map and measure the orientation of lineaments and faults in a digital format. The lineaments identified include a set parallel to dip (A–C), a set parallel to strike (B–C), and two sets oblique to strike. Lineament orientation data were analyzed using length-weighted rose diagrams, whereas fold geometry and plunge were evaluated using equal-area (lower hemisphere) stereonets. Although the study was limited in scope to a computer-based geometric analysis and did not include outcrop-based kinematic data, the lineament/fracture data derived from Google Earth mapping are nevertheless compatible with published studies that demonstrate regional NE-SW shortening along the western Owl Creek transpressive zone during the Laramide orogeny. Google Earth Pro proved to be a highly effective tool for gathering lineament orientation and spatial distribution data across these well-exposed anticlines.